Not quite sure what your problem is, but let me walk you through as I do the kick. Sorry if I am too elementary. (Not sure what your level is) If I am kicking with my right heel, I would cross step behind the right foot making sure that the toes of my left foot are pointed directly behind me. Hard to have any balance if those toes aren't pointed in the correct direction. As I cross stepped, you'll notice that you have built up some "torque" in your body. Allow your elbow to help drive the upper body through the kick, which will drive the heel towards your target with power. I hope I was clear and I hope this helped. dtfrank Temecula, CA